New Jersey's "Summer Of Bruce" ended with a bang Thursday night as the Boss invited a few famous friends to share his spotlight.Springsteen hasn't hosted many guest stars on his current tour (his first with the E Street Band in over a decade). But for the fifteenth and final night of a sold-out string of dates at the Continental Airlines Arena, Bruce was joined on stage by Jon Bon Jovi, Richie Sambora, and Melissa Etheridge for a rousing rendition of "Hungry Heart." Bon Jovi, the band, is currently in a New Jersey studio working on its first album since 1995's "These Days" (see "Jon Bon Jovi Has Sex In The City; Band Prepares To Record"). Etheridge is expected to release her next album in October. Springsteen and the E Street Band, meanwhile, continue their tour on August 21 at the FleetCenter in Boston.